ATTACK DP STANDARD Instructions For Use Manual page 15

Time of pause of the C.H. pump [Pc --] - when the boiler temperature exceeds the temperature
set by parameter [P 65] and operation mode stops the pump (e.g. when the contacts of thermo-
stat are open or when the fan is stopped), can the pump be regularly started for 30 seconds to
pump water into the heating system. This parameter sets pause time in minutes between
operation cycles of the pump. Setting of this parameter to „--" inactivates this function.
Delay of the C.H. pump stop [Pd 2] – too early C.H. pump stop might cause boiler tempera-
ture increase and consequently its overheating. This parameter enables to set delay of the C.H.
pump stop. Setting of this parameter to „--" means, that the pump will be stopped without delay.
Setting of operation boiler temperature
Min. boiler temperature [L 65] - min. temperature, that can be set through rotary thermostat.
Max. boiler temperature [H 90] - max. temperature, which can be set through rotary thermostat.
Hysteresis of the boiler temperature [h 5] - this parameter defines, to which value should
temperature of water in the boiler decrease, under value set through rotary thermostat to start
the suction fan.
Boiler protection against overheating
Temperature of boiler overheating [A105] – boundary value - after exceeding of this value is
the suction fan indefinitely stopped and the circuiting pump is started to prevent from boiler
overheating. The overheating mode is indicated by the control light of boiler overheating and
error messaging [E 2] on display. Error can be turned off by pressing STOP button, but only
when the boiler temperature decreases under the set value of the boiler overheating tempera-
ture. The suction fan is stopped also, when the boiler thermostat sensor is damaged and this
error is displayed as message [E 1].
Emergency thermostat – regulator has also additional protection against overheating, which
is independent from processor. In case of temperature increase to 95°C , the control process is
launched by ventilator stop and pump start. Ventilator and pump are included into the control
process again, when the temperature reaches 89°C. Emergency thermostat enables more
precise boiler regulation and eliminates possibility of overheating.
Fuel shortage testing
If central heating installation is equipped with exhaust gas temperature sensor ([Fc 1]), then
fuel shortage testing starts when exhaust gas temperature falls below temperature set with
additional thermostat knob. If there is no exhaust gas temperature sensor ([Fc 0]), then fuel
shortage testing starts when boiler water temperature falls below value of [L 65]. If tempera-
ture tested during fuel shortage testing stays below threshold for specified time, the controller
will stop regulation process and will show [FUEL] message on the display. This alarm can be
erased with STOP button.
Fuel shortage control during the boiler start [Fd 60] - the time set by this parameter is used
for fuel shortage control during the boiler start. Boiler is considered as started, when the
regulator is switched from the STOP mode to WORK mode and finishes, when the boiler
temperature exceeds minimum temperature set by the parameter [L 65]. Setting of parameter
[Fd 60] to „--" inactivates fuel shortage control during the boiler start.
Time of fuel shortage control in the operation mode [Fb30] – the time set by this parameter
is used, when the fuel shortage control starts after the boiler was started. Setting of this
parameter to „--" inactivates fuel shortage control in the operation mode.
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